It won't work, China is perfectly happy to block every external Web site as necessary. They're fine with relying solely on their internal network, they've structured things to that end as it is now. Censorship does work if you're willing to insulate your nation from external media, as they prove time and time again that they are. That's why censorship has worked in North Korea for nearly 70 years. It works if you're willing to pay whatever the consequences involved happen to be.